If you’re working on a DirectX 9-based project for the Oculus Rift, you may wish to consider a change of direction. As spotted by NeoGaf, the Oculus folks will be ‘deprecating’ support for DX9 from the next Software Development Kit release.
That doesn’t necessarily mean it’s all over for DX9 games in the Oculus Rift, as “Apps that use DirectX 9 will continue to work for the foreseeable future” and certain older titles have alternative OpenGL options which will still be fully supported.
The thread linked above also mentions something called ‘Extended Mode’ which apparently would keep a lot of older games working too. As I’m not familiar with what this is, I can’t really comment on that.
In addition, Oculus says that DirectX 9 applications “won’t compile in future SDK releases and may have additional runtime latency after we remove DirectX 9 support.”
Future work will focus on DirectX 11 (and, though not mentioned, presumably DirectX 12) and OpenGL.